Since we're on the subject of vanilla...I had a 30ml bottle of M-Boro and I mixed in some 555...not too bad, took the edge off the Marlboro. Then I had some RY4, but it was 36mg which was too strong for me, so I added that to my 555/M-Boro mix...results were not good...very harsh. I just took a 15ml bottle and filled it up a 1/4 with Milton's Vanilla and the rest with my previous concoction...turned out pretty good, mostly a nice smooth vanilla flavor.